Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47a3f1e2da5f670…

MALICIOUS

PDF

38.7 KB Created: 2020-04-06 03:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03e9cb3217b036c3b840c870ffbee995 SHA-1: 64274f46d8f5cc5dc01a1e834fb36b2b4c8ddebf SHA-256: e47a3f1e2da5f6708145bf87576d08f93fd76ee96e8beef4b497b114b24b2e9c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to a product review, likely a lure to disguise the malicious nature of the links. The primary attack pattern appears to be directing users to a link farm for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://kohno-corp.com/uploads/1/3/0/2/130291662/130291662.html#silk%E2%80%99n+bellaflash+pro+hair+removal+system+reviews
    • http://coachingvan.com/uploads/1/3/0/6/130639160/jemegetifur-rimulip-latadiwejonuda-lugitoxasat.pdf
    • http://academictranscripts.com.au/uploads/1/3/0/8/130813577/mowoxajevixuxesotar.pdf
    • http://vancouverbrokerageproposal.com/uploads/1/3/0/3/130323674/xekozuletu.pdf
    • http://planabooks.com/uploads/1/3/0/5/130589128/wagexaxawid.pdf
    • http://rubyarreguin.com/uploads/1/3/0/4/130489410/memajodinimivuf.pdf
    • http://henrymortonstanelyschoolofchristianjournalism.org/uploads/1/3/0/7/130776582/tonutojibap-dokexopuk-kokibi-vupupad.pdf
    • http://randomminds.net/uploads/1/3/0/3/130323175/5214766.pdf
    • http://meta-xinutrition.com/uploads/1/3/1/3/131384638/6833258.pdf
    • http://personaloutfits.com/uploads/1/3/0/7/130738568/98639.pdf
    • http://theopticalshop.net/uploads/1/3/0/6/130621223/sukijivake_mejodogidon_kekarigurokigaw.pdf
    • http://snowshovelmt.com/uploads/1/3/0/6/130605405/8822799.pdf
    • http://tiastokes.com/uploads/1/3/0/5/130589396/292da4ad0d.pdf
    • http://livingculture.co/uploads/1/3/0/8/130873708/fapogokid-salelo-padam.pdf
    • http://lithozen.be/uploads/1/3/1/4/131437322/mokajuritadomudex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1f.bin
e5f70da79bff0df3bf43237b010b5b8f4d2597fa67b142d95ca2cebf77998909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1F 7680 bytes

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